2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 81Get this manual
ENGINE OIL REPLACEMENT
INSP ADJ
7.Fill: Crankcase Refer to "ENGINE OIL LEVEL INSPECTION"Oil quantity: Periodic oil change: 2.3 (2.0 Imp qt, 2.4 US qt) With oil filter replacement: 2.4 (2.1 Imp qt, 2.5 US qt) Total amount: 2.6 (2.3 Imp qt, 2.7 US qt) 8.Install: Engine oil filler plug 9.Warm up the engine for few minutes, then stop the engine10.Inspect: Engine (for engine oil leaks) Oil level Refer to "ENGINE OIL LEVEL INSPECTION"11.Check: Engine oil pressure